Japan holds a relative advantage amid geopolitical disruptions as the equity market enters a corporate governance catalyst window

Overview

This issue of Japan Weekly Kickstart focuses on the impact of geopolitical uncertainty on the Japanese market, especially the pause in the Iran war, energy supply risks, and Japan's relative resilience. The report argues that Japan is relatively favored in the global uncertain environment thanks to alternative crude oil and LNG supply routes, substantial strategic petroleum reserves, and an upcoming corporate governance catalyst window.

Core views

The core views are: first, although the ceasefire remains fragile, geopolitical concerns have eased somewhat, improving Japanese equity fund flows and market performance; second, both foreign and domestic institutions have recently been net buyers of TSE Prime cash equities, while individual investors have been net sellers; third, AI and other year-to-date strong themes have regained leadership in April; fourth, the draft corporate governance code further emphasizes capital efficiency, cash allocation, and the unwinding of cross-shareholdings, which may support future shareholder returns and governance improvements.

Analysis framework

The report evaluates Japan's relative position after the geopolitical shock by combining TSE fund flows, TOPIX and Nikkei 225 trends, sector and theme index performance, the energy supply backdrop, and changes in corporate governance policy. The appendix methodology uses a liquid Japanese equity sample to construct equal-weight sector, sub-sector, and theme indices, and tracks index performance as well as the spread between the best and worst performing constituents.

Methodology notes

• Equity portfolio strategyJapan liquid equity sector and theme equal-weight index framework

  Uses Japanese equities with six-month average daily turnover above US$20mn as the sample and constructs equal-weight indices by MSCI sector, sub-sector, and theme dimensions.

  As of 2025-12-17, the sample included 271 Japanese stocks; there are 45 indices in total, covering sectors and sub-sectors defined by MSCI, as well as cross-sector themes such as high dividend and Gaming. Constituent selection relies on quantitative metrics and/or Goldman Sachs equity analyst views, and the same stock may be included in multiple indices.

• Performance decompositionBest-Worst spread

  Measures the gap between the best-performing constituent and the worst-performing constituent within each index.

  This indicator is used to observe the degree of stock-level dispersion within an index, and together with the weekly performance of the equal-weight index average, assess the volatility and breadth of theme or sector performance.

• Sample constraintsLiquidity threshold and newly listed stock exclusion rule

  Only include stocks with six-month average daily turnover above US$20mn, and exclude trading performance for the first 12 months after IPO.

  This constraint reflects institutional client liquidity requirements and makes the index closer to a tradable Japanese equity investment universe; the stock universe is planned to be refreshed once a year.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• Japanese equity market

  core research object

  Strengths

  More convenient alternative crude oil and LNG supply routes, larger strategic petroleum reserves, renewed net foreign buying, and an upcoming corporate governance catalyst window.

  Weaknesses

  Still affected by global geopolitical events, energy prices, and changes in risk appetite.

  Comparison

  Compared with other countries, Japan is viewed as being in a stronger position in terms of energy supply substitution and reserves.

  Risks

  Fragile ceasefire, renewed oil and gas supply disruptions, and a global equity market correction could weigh on valuations.

• TOPIX / NK225

  Japanese broad market performance indicators

  Strengths

  After a sharp March pullback, both rebounded notably in April, and TPX has already approached its February all-time high.

  Weaknesses

  The prior correction shows that the indices remain sensitive to macro and geopolitical shocks.

  Comparison

  TPX rebounded +7% after a -11% March pullback, while NKY rebounded +11% after a -13% March pullback.

  Risks

  If geopolitical risks escalate or fund flows reverse, the rebound may be difficult to sustain.

• AI-related theme indices

  high-beta themes benefiting from risk appetite recovery

  Strengths

  SPE and AI Beneficiaries are up +22% and +19% respectively so far in April, once again becoming among the best-performing themes for the month.

  Weaknesses

  Both fell -18% in March, indicating high volatility.

  Comparison

  Compared with March weakness, they posted a pronounced reversal in April as geopolitical concerns eased.

  Risks

  High-volatility themes are sensitive to valuation, risk appetite, and sentiment toward technology stocks.

• Non-Ferrous Metals, Glass & Ceramics

  top sectors listed on the cover

  Strengths

  Listed as top sectors in the report, indicating relatively strong performance during the period.

  Weaknesses

  Limited fundamental detail is disclosed in the input text.

  Comparison

  Performed better than bottom sectors such as Mining and Oil & Coal.

  Risks

  Commodity prices, demand, and changes in the global trade environment may affect performance.

• Mining, Oil & Coal

  bottom sectors listed on the cover

  Strengths

  Related to geopolitical and energy supply risks, with event-driven attention.

  Weaknesses

  Listed as bottom sectors in the report, indicating lagging performance during the period.

  Comparison

  Performed worse than top sectors such as Non-Ferrous Metals and Glass & Ceramics.

  Risks

  Energy price volatility, policy changes, supply disruptions, and demand uncertainty.

Key data

• TOPIX and Nikkei 225TOPIX: 3,739.85 (2.6%); NK225: 56,924.11 (7.2%)Cover page market snapshot data.
• March pullback and April reboundTPX -11%, NKY -13%; so far in April, they have rebounded +7% and +11% from the lowsShows that Japan's major indices recovered quickly after the March correction.
• Distance from TPX all-time highabout +5%TPX is only about 5% away from its February all-time high.
• TSE Prime fund flowsforeign investors net bought ¥1.9tn, domestic institutions net bought ¥139bn, individual investors net sold -¥450bnCorresponds to the latest TSE data for the week of March 30 to April 3.
• April performance of AI themesSPE +22% mtd; AI Beneficiaries +19% mtdBoth AI-related indices were -18% mom in March and showed a clear reversal in April.
• Corporate cash and depositsmore than ¥270tnThe chart title shows Japanese corporates hold more than 270 trillion yen in cash and deposits.
• Liquid equity sample271 stocksNumber of Japanese stocks with six-month average daily turnover above US$20mn as of 2025-12-17.
• Number of sector and theme indices45 equal-weight indicesCovers MSCI sectors, sub-sectors, and cross-sector themes.

Impact & implications

For investors, the report suggests that Japanese equities have relatively defensive characteristics amid energy supply shocks and geopolitical risks, while corporate governance reform, shareholder return policies, and foreign inflows may become positive near-term catalysts. At the thematic level, AI-related indices have strong upside elasticity when risk appetite recovers; however, sectors such as energy, mining, and oil & coal remain differentiated in performance and still need to be monitored together with supply risks and global macro volatility.

Risks

• The Iran war ceasefire is described as a fragile truce, so geopolitical uncertainty may recur.
• If crude oil and LNG supply routes are disrupted again, Japan's relative advantage could weaken.
• Japan's main indices saw a significant correction in March, showing that the market remains sensitive to macro risks and global risk appetite.
• AI-related themes are highly volatile, with a sharp March decline followed by a strong April rebound; investors should watch crowding and valuation risks.
• Corporate governance catalysts depend on the actual execution of shareholder returns, capital efficiency improvements, and cross-shareholding unwinding by companies.

What to watch

• The direction of future fund flows from foreign investors, domestic institutions, and individual investors in TSE.
• Developments in Iran, the durability of the ceasefire, and changes in crude oil and LNG supply chains.
• Japanese corporate earnings releases, shareholder return policies, medium-term management plans, and annual general meetings after the end of April.
• The implementation pace of the FSA draft revisions to the corporate governance code regarding capital efficiency, cash allocation, and cross-shareholding unwinding.
• Whether AI-related indices, SPE, and other year-to-date winning themes can sustain their rebound.
• Whether TOPIX can break through its historical high and whether the Nikkei 225 rebound can continue.